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I have a pair of RUT240s running RUT2_R_00.07.02.7 firmware

There is a GRE tunnel that runs between them, and I can successfully ping everywhere one would expect.

What is needed to get multicast traffic generated at each end to transfer to the other end?

Thanks in advance,

Roche
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I have tried adding a route using the CLI:

ip route add 224.9.9.9/4 dev gre4-XXX

and it does appear in the routing table, but multicast traffic does not traverse the tunnel...

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Hello,

For multicast to be possible, an additional package might be necessary called igmpproxy. You should be able to download it via Services -> Package manager from the WebUI. A new section in the Services menu should appear afterwards.

I'm not particularly familiar with the package, thus, hopefully, following links will help with the configuration:

Best regards,